二度と【にどと】
never again
二宮【にぐう】
the Two Ise Shrines
不二【ふに】
advaitam (non-duality)
不二【ふじ】
being two sides of the same coin, being the same (while appearing different), Very sincerely yours, peerless, unparalleled, unparallelled
二人【ふたり】
two persons, two people, pair, couple
二つ【ふたつ】
two
二階【にかい】
second floor, upstairs
二重【にじゅう】
double, two-fold, two layers, duplex, diplo-, dipl-, double-edged eyelid, double eyelid, creased eyelid
二人とも【ふたりとも】
both (people), the two of them
二流【にりゅう】
second-rate, inferior
二日酔い【ふつかよい】
hangover
十二【じゅうに】
twelve, 12, queen
二死【にし】
two out, two down (and one to go)
二塁【にるい】
second base
二塁打【にるいだ】
two-base hit, double
二度【にど】
two times, twice, two degrees
二次【にじ】
second, secondary, quadratic (function, equation, etc.), second-order
二階建て【にかいだて】
two-storied building
二世【にせい】
nisei, second-generation Japanese (or Korean, etc.), person of Japanese parentage with non-Japanese citizenship, the second (e.g. Edward II), son
二十四時間制【にじゅうよじかんせい】
around-the-clock system